Pileup subtraction for jet shapes
Abstract
Jet shapes have the potential to play a role in many LHC analyses, for example in quark-gluon discrimination or jet substructure analyses for hadronic decays of boosted heavy objects. Most shapes, however, are significantly affected by pileup. We introduce a general method to correct for pileup effects in shapes, which acts event-by-event and jet-by-jet, and accounts also for hadron masses. It involves a numerical determination, for each jet, of a given shape's susceptibility to pileup. Together with existing techniques for determining the level of pileup, this then enables an extrapolation to zero pileup. The method can be used for a wide range of jet shapes and we show its successful application in the context of quark/gluon discrimination and top-tagging.
Keywords
Cite
@article{arxiv.1211.2811,
title = {Pileup subtraction for jet shapes},
author = {Gregory Soyez and Gavin P. Salam and Jihun Kim and Souvik Dutta and Matteo Cacciari},
journal= {arXiv preprint arXiv:1211.2811},
year = {2013}
}
Comments
5 pages, 2 figures